—Yesterday I lost my pencil sharpener.  I couldn’t find_______.—Oh, it’s a pity. You’d better buy ________ this afternoon.

We have two foreign teachers here. One is from England, and ______ is from America.

Where are his books?     _________ on his bed.

I don't understand the story though there are___  new words in it.

Grades are really important, but they’re not ______ to us students.